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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.example.android.elevationbasic;
     18 
     19 import android.support.v4.app.Fragment;
     20 import android.os.Bundle;
     21 import android.view.LayoutInflater;
     22 import android.view.MotionEvent;
     23 import android.view.View;
     24 import android.view.ViewGroup;
     25 
     26 import com.example.android.common.logger.Log;
     27 
     28 public class ElevationBasicFragment extends Fragment {
     29 
     30     private final static String TAG = "ElevationBasicFragment";
     31 
     32     @Override
     33     public void onCreate(Bundle savedInstanceState) {
     34         super.onCreate(savedInstanceState);
     35         setHasOptionsMenu(true);
     36     }
     37 
     38     @Override
     39     public View onCreateView(
     40             LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
     41         /**
     42          * Inflates an XML containing two shapes: the first has a fixed elevation
     43          * and the second ones raises when tapped.
     44          */
     45         View rootView = inflater.inflate(R.layout.elevation_basic, container, false);
     46 
     47         View shape2 = rootView.findViewById(R.id.floating_shape_2);
     48 
     49         /**
     50          * Sets a {@Link View.OnTouchListener} that responds to a touch event on shape2.
     51          */
     52         shape2.setOnTouchListener(new View.OnTouchListener() {
     53             @Override
     54             public boolean onTouch(View view, MotionEvent motionEvent) {
     55                 int action = motionEvent.getActionMasked();
     56                 /* Raise view on ACTION_DOWN and lower it on ACTION_UP. */
     57                 switch (action) {
     58                     case MotionEvent.ACTION_DOWN:
     59                         Log.d(TAG, "ACTION_DOWN on view.");
     60                         view.setTranslationZ(120);
     61                         break;
     62                     case MotionEvent.ACTION_UP:
     63                         Log.d(TAG, "ACTION_UP on view.");
     64                         view.setTranslationZ(0);
     65                         break;
     66                     default:
     67                         return false;
     68                 }
     69                 return true;
     70             }
     71         });
     72         return rootView;
     73     }
     74 }